78555034537351 has 4 divisors (see below), whose sum is σ = 78562080475000. Its totient is φ = 78547988599704.

The previous prime is 78555034537337. The next prime is 78555034537391. The reversal of 78555034537351 is 15373543055587.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78555034537351 - 2⁵ = 78555034537319 is a prime.

It is a super-2 number, since 2×78555034537351² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78555034537351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78555034537321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3522952101 + ... + 3522974398.

It is an arithmetic number, because the mean of its divisors is an integer number (19640520118750).

Almost surely, 2^{78555034537351} is an apocalyptic number.

78555034537351 is a deficient number, since it is larger than the sum of its proper divisors (7045937649).

78555034537351 is a wasteful number, since it uses less digits than its factorization.

78555034537351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045937648.

The product of its (nonzero) digits is 132300000, while the sum is 61.

The spelling of 78555034537351 in words is "seventy-eight trillion, five hundred fifty-five billion, thirty-four million, five hundred thirty-seven thousand, three hundred fifty-one".